Looking for a spare spear shaft for your next spearfishing adventure? The AB Biller Speargun Shaft makes for a great choice to have as a spare or replacement shaft since it’s made from spring steel alloy that is heat treated to Rockwell 44C. The AB Biller shaft possesses a unique combination of hardness and spring tension, and with 6mm threading, you have virtually endless possibilities for your choice of spear tips. This speargun shaft fits AB Biller Speargun Models SM 32, ST 32, SP 32, and SS 32.